Steam-trap.



G. W. JUDD.

STEAM TRAP.

APPLICATION FILED OUT. 2a, 1908.

Patented Feb. 3, 1914.

3 SHEETS-SHEET 1.

WITNESSES.-

C. W. JUDD.

STEAM TRAP.

APPLIOATION FILED 001*. 23, 1905.

1 Patented Feb.3,1914.

3 SHEETS-SHEET 2.

Ell/70R 7%" @646, BY m ATTORNEY I COLUMBlA PLANOGRAPH COUWASHINGTON. D. c.

C. W. JUDD.

STEAM TRAP.

APPLICATION FILED OUT. 2a, 1908.

1,085,983. Patented Feb. 3 1914.

3 SHEETS-SHEET 3.

WITNESSES: llVl/ENTOR By I .7flovm Q7626 ATTORNEY- COLUMBIA PLANOGRAPH 00.. WASHINGTON, Dv c.

FTQ.

CHARLES W. JUDD, OF LOWELL, MASSACHUSETTS.

STEAM-TRAP.

2 '0 all whom, it may concern Be it known that I, CHARLES WV. June, a citizen of the United States, residing at Lowell,- in the county of Middlesex and Commonwealth of Massachusetts, have invented a certain new and useful Improvement in Steam-T raps, of which the following is a specification.

This invention relates to steam-traps of that kind which automatically discharge the water of condensation from a movable receiver.

The objects of said invention are to enable the same trap, with slight changes in the connections and a half revolution of the steam-pipe or outlet pipe to serve on the one hand as a tank-trap, non-return or dischargetrap which discharges into a drain or 1nt0 a tank from which the water may be pumped to provide the counterbalancing lever with a changeable fulcrum; to facilitate the movement of the receiver; to provide adjustable stops; to limit the movement of the receiver and to regulate the position of the stream and vent valve.

In the accompanying drawing, on three sheets, Figure l is a side elevation of a return trap provided with my improvement, a part of the free end of the receiver being in central sectionto show the pipe through which steam flows to equalize the pressure in the receiver and in the boiler, the trap being in the position it occupies when being emptied; Fig. 2, a. side elevation of a trap showing in full lines the position of the trap when empty or nearly so and in dotted lines its position when the weight of water in the receiver sufficiently exceeds that of the counterbalance; Fig. 3 a plan oft-he pipes for steam and water, the counterbalancing devices and a part of the receiver, the trunnions, stuffing-boxes, valve and valve-chamber being in horizontal section on the line 3 3 in Fig. 4:; Fig. 4, a side elevation of the air and steam valve, the trunnions, means for Specification of Letters Patent.

Application filed October 23, 1998.

Patented Feb. 3, 1914.. Serial No. 459,174.

connecting said trunnion and valve and the valve-cha1nber with the cover removed; Fig. 5, a vertical central transverse section of the valve-chamber and a front elevation of said valve, means for connecting said valve to a trunnion and a part of said trunnion; Fig. 6, a plan of the steam and air valve; Fig. 7 a front elevation of the trap; Fig. 8, a side elevation of the trap, the upper part of the receiver being partly in section, the trap bemg represented as a. non-return or discharge trap, showing also a modification of the counterbalancing lever. 1

A (Figs. 1, 2, 7 and 8) indicates a solid base on which is secured as by bolts 6 6 a suitable supporting frame B which may be made in a single casting and is represented as having a plate 6 uprights 72? 6 connected by a horizontal cross-bar b at the ends of which are vertical stands 6 b.

The receiver C is preferably a. hollow bulb, the neck 0 of which is closed by a cylindrical head 0 which is externally threaded and screwed into or otherwise secured in said neck in a steam-tight manner. The head 0 is provided with hollow trunnions c 0 which extend horizontally on opposite sides of the head and enter stuffing-boxes D D supported in the stands b I) in which said stuffing-boxes may be prevented from movement by screws cl 6Z1. Each stuffing-box D D has at its inner end a chamber (Z 0Z concentric with the corresponding trunnion c or 0 to receive a hollow cylindrical follower d" d which is crowded into said chamber by a screw-cap (Z (Z which compresses a packing d (Z into the bottom of said chamber.

The body of the valve-chamber E is preferably cast in one piece with the stuffingbox 1) and the trunnion 0 extends into and opens into said chamber E and within said chamber carries a radial arm F which is prevented from turning on said trunnion c by a setscrew f. The free end f of said arm F is spherical and enters and has a sliding lit in a correspondingly shaped cavity'in the valve G, said cavity being formed partly in the body of said valve and partly in a separate section 9 which is let into the body of the valve and retained in place by screws 9 g or equivalent means. The valve G is cut away at g on top between its ends to bring the center of gravity below the center of the sphere 7, so that the weight of the valve will hold it in a horizontal posit-ion at all times. The ends of the valve G are parallel and vertical.

Two pipes H I communicate with the valve-chamber and project into the same, the pipe H serving, when the trap is used as a return-trap, to admit steam to equalize the pressure in the receiver C with that in the boiler and in a discharge-trap, to discharge the water of condensation from said receiver. The pipe I in a return-trap serves as an air vent and in a discharge-trap is used only in blowing out the trap and the system connected therewith. When the receiver C is at rest, the valve G closes one or the other of the pipes H I.

The hollow trunnion communicates with the receiver through the bent pipe J which, in a return-trap, occupies the position shown in Fig. 1 and serves to admit steam to the receiver and to allow the escape of air accordingly as the valve G closes the pipe I or the pipe H, the admission of steam taking place when the receiver is in its lowest position and the venting of the air taking place when the receiver is in its highest position. In a discharge trap the pipe J occupies the position shown in Fig. 8, that is, it is turned a half revolution from the position shown in Fig. 1 and then serves to discharge the water of condensation from the receiver through the pipe H. The pipe J passes longitudinally through the head 0 and is provided within said head with a shoulder j which rests against an annular bearing and with another shoulder j against which a packing is, which surrounds said pipe J below the trunnio-ns, is forced by a screw threaded gland K. By loosening the gland the pipe J may be turned half way around by means of a wrench applied to a many sided plug rigidly secured in the lower end of the pipe J (Figs. 3 and 7). The pipe J is provided with openings j 1' and one or the other of these openings, according to the position of said pipe, communicates with the trunnion 0 The trunnion c communicates with the receiver C through the passage 0" in the head 0 as shown in Fig. 3, and a nipple c is screwed into the outer end of the stuffing box D A T c connects the nipple with two pipes L M, one L of which in a return trap conveys the drip or water of condensation to the receiver and the other M of which returns said water from said receiver to the boiler, each of said pipes containing a check valve Z m which controls the direction in which the water flows. here the trap is used as a discharge trap the pipe M may be dispensed with or replaced by a plug.

The counterbalancing lever N carries a weight a which may be adjusted on one arm of said lever in the usual manner and the receiver C is connected by a link n to the other arm of said lever above thesame, so that when the receiver is empty, the weight and receiver are in the positions shown in full lines in Fig. 2 and when the receiver contains a predetermined amount of water, said receiver and lever are in the positions shown in dotted lines in said Fig. 2 and in full lines in Fig. 1, the movement of said receiver and weight being limited by vertically adjustable stops 0 O represented as screws, one 0 of which turns in the fulcrumstand 1? and limits the downward movement of the receiver and the other screw 0 turns in the base 13 and limits the downward movement of the weight and the connections of the parts are such that limiting the movement of the receiver or weight in one direction limits the movement of the weight or re ceiver in the other direction.

The lever N is represented in Figs. 1 and 2 as offset upwardly at n and this offset is provided on its under side with a rack 11- which engages a fulcrum-rack n pivoted at a in a vertical slot 79 in the fulcrunrpost P, through which slot said lever N is passed, the sides of said slot guiding said lever and retaining it on said fulcrum rack. The fulcrum-rack n is provided with a lateral arm n which is connected by a link a to the re ceiver C by the same pivot 10, which connects the link a to said receiver, so that when the free end of the receiver descends the corresponding end of the lever N is depressed and also by the turning of the fulcrum'raclr, its fulcrum is changed so that the outer arm of said lever is lengthened increasing the leverage which the receiver opposes to the weight, thus increasing the speed at which the receiver falls. \Vhen the weight descends the weighted arm of the lever N is similarly lengthened by the changing of its fulcrum and the receiver rises more rapidly. By adjusting the stops, the valve may be made to fit its seats accurately when said valve or either of said seats become worn.

In Fig. 8 the lever N is supported directly on the fulcrum a and the fulcrumrack shown in Figs. 1 and 2 is omitted, the other parts being as shown in the other figures and denoted by the same letters of reference.

I claim as my invention 1. The combination in a steam-trap, of a receiver, provided with a head having hollow trunnions, a bent pipe having openings each adapted to communicate with one of said hollow trunnio-ns, said pipe being arranged in said head and projecting from opposite ends thereof and extending into said receiver and adapted to be turned to connect the top or bottom of said receiver with one of said trunnions through one or the other of said openings in said pipe and means arranged outside of said head and receiver for holding said bent pipe in either of said positions whereby steam may enter the upper part of said receiver from said last named trunnion or water may be discharged from said receiver through said trunnion.

2. The combination in a steam trap, of a receiver provided with a head having hollow trunnions, a bent pipe arranged in said head and projecting from opposite ends thereof and having shoulders within said head, said pipe extending into said receiver and having openings within said head and adapted to be turned to connect the top or bottom of said receiver through one of said openings with one of said trunnions and means arranged outside of said head and receiver for turning said pipe and for holding said pipe in either of said positions, whereby steam may enter the upper part of said receiver from said last-named trunnion or water may be discharged from. said receiver through said trunnion.

3. The combination in a steam-trap, of a rocking receiver, having an inlet and an outlet, a counterbalancing weight, a lever provided with a rack, on one arm of which lever said weight is hung, and on the other arm of which said receiver is supported, and a pivoted fulcrum rack, engaging the rack of said lever and means connecting said receiver and said fulcrum rack to rock said fulcrum rack whereby the falling of said receiver will lengthen said last named arm and whereby the falling of said weight will shorten said last namedarm.

In witness whereof, I have affixed my signature in presence of two witnesses.

CHARLES W. JUDD.

' WVitnesses:

ALBERT M. Moore, LUDGER A. NIooL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of iatentl. Washington, D. 0." 

